tion SendMessage Lib "user32" _ Alias "SendMessageA" ( _ ByVal hwnd As Long, ByVal wMsg As Long, _ ByVal wParam As Long, lParam As Any) As Long Public Const HTCAPTION = 2 Public Const WM_NCLBUTTONDOWN = &HA1 然后，在 Form_MouseDown 事件中： Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single) ReleaseCapture SendMessage hwnd, WM_NCLBUTTONDOWN, HTCAPTION, 0& End Sub [返回技巧索引]
快速选择全部项目 我们在使用 List 控件时，经常需要全部选择其中的项目，在项目较少时，我们可以逐项设置 Selected 来选择全部的项目，但当项目较多时，这样做就比较费时，其实，我们可以用 API 函数来简单实现此功能： Dim nRet As Long Dim bState as Boolean bState=True nRet = SendMessage(lstList.hWnd, LB_SETSEL, bState, -1) 函数声明： Public Declare Function SendMessage Lib "User32" Alias "SendMessageA" ( ByVal hWnd As Long, ByVal wMsg As Integer, ByVal wParam As Long, ByVal lParam As Long) As Long Public Const WM_USER = &H400 Public Const LB_SETSEL = (WM_USER + 6) [返回技巧索引]
显示动画鼠标图标 Win95 的动画鼠标为应用程序增色不少，而 VB 则只提供一般的鼠标图标支持。要用 VB 显示动画鼠标形状，你可以使用以下方法： 函数声明： Public Const GCL_HCURSOR = -12 Declare Function ClipCursor Lib "user32" (lpRect As Any) As Long Declare Function DestroyCursor Lib "user32" (ByVal hCursor As Any) As Long Declare Function LoadCursorFromFile Lib "user32" Alias "LoadCursorFromFileA" (ByVal lpFileName As String) As Long Declare Function SetClassLong Lib "user32" Alias "SetClassLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Declare Function GetClassLong Lib "user32" Alias "GetClassLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long 使用： Dim mhBaseCursor As Long, mhAniCursor As Long Dim lResult As Long mhAniCursor = LoadCursorFromFile("c:\windows\cursors\appstart.ani") lResult = SetClassLong((hwnd), GCL_HCURSOR, mhAniCursor)
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